Driven drops on heterogeneous substrates: onset of sliding motion |
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Authors: | Thiele Uwe Knobloch Edgar |
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Institution: | Max-Planck-Institut für Physik komplexer Systeme, N?thnitzer Strasse 38, D-01187 Dresden, Germany. |
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Abstract: | Pinning and depinning of driven drops on heterogeneous substrates is studied as a function of the driving and heterogeneity amplitude. Two types of heterogeneity are considered: a "hydrophobic" defect that blocks the drop in front and a "hydrophilic" one that holds it at the back. Two different types of depinning leading to sliding motion are identified, and the resulting stick-slip motion is studied numerically. |
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